Light-excluding attachment for camera-plate holders.



No. 743,216. PATENTED NOV. 3, 1903.

R. A. BACON. LIGHT EXCLUDING ATTACHMENT FOR CAMERA PLATE HOLDERS.

APP'LIUATION FILED MAR. 18, 1903.

N0 MODEL.

INVENTOH UNITED STATES Patented November 3, 1903.

PATENT OEEIcE.

ROBERT A. BACON, OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 743,216, dated November 3, 1903.

Application filed March 18, 1903.

To all whom, it may concern:

Be it known that 1, ROBERT A. BACON, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented new and useful Improvements in Light-Excluding Attachments for Camera Plate-Holders, of which the following is a full, clear, and exact description.

My invention relates to photographic camera attachments, and has particular application to a novel and useful device for preventing photographic plates from becoming lightstruek in the plate-holders.

As is well known, many artistic and valuable pictures are entirely ruined through a ray of light striking the plate at the instant the dark slide is withdrawn from the plateholder, and many attempts have been made to overcome this difficulty, especially by construeting the plate-holder and the dark slides in various ways, but such attempts have met with little or no success.

It is the object of my invention, therefore, to overcome the difficulty above mentioned by providing an attachment which will be exceedingly simple and economic in its construction and one which may be readily used in a camera or a plate-holder in such manner as to effectively exclude every ray of light.

To this end the invention consists in the construction, combination, and arrangement of parts, as is described in this specification, delineated in the accompanying drawings, and set forth in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a conventional view of a camera and the dark slide of a plate-holder, such View illustrating the manner of employing my improved light-eXcludin g attachment. Fig. 2 is a view showing the wire or metal forming a part of the attachment, and Fig. is a view of a modified form of a supporting=frame. Fig. 4 is a view of the complete light-excluding attachment.

Referring now to the accompanying drawings, Ain Fig. 1 designates an ordinary can Serial No. 148.363. (N0 model.)

era-box in connection with which my attachment is designed to be used. The ordinary dark slide of aplate-holder of any well-known type is designated by the letter B and is shown in this view as being withdrawn from the plateholder in the camera-box.

The improved light-excluding attachment to which this invention particularly relates I have designated as a whole by the letter C, and comprises in the present instance a metalli 0 frame composed, preferably, of wire bent centrally, as at D, so that the two members or arms E and F are of approximately equal length and size. XV here the wire frame is bent centrally it is widened or enlarged, so that shoulders G G are formed between said enlarged portion D and the arms E and F, the extremity of the arm E being slightly curved or bent, as shown at 6, while the opposite arm F is curved to form a hook-like portion f, adapted to bear upon and engage with the curved extremity e of the arm E, whereby the two arms are locked together, as shown in Figs. 1 and 2. This frame is adapted to have applied thereto a covering of photo graphically-dark material, which is shown at ll in Fig. 1, the material of said covering being of any soft fluffy character, chenille servin g very well for this purpose. The material is applied to the frame so as to entirely cover the same in such manner that it is impossible for a ray of light to pass between the armsE and F of the wire framework when such arms are in their interlocked positions, as shown in Figs. 1 and 2. Before inserting the slide into the plate-holder it is passed into the interlocked arms E and F, so that when the slide has been inserted the full distance within the holder my attachment will rest against the edge of said holder and will prevent any light from passing between the spaces between the slide and the holder and striking the plate, and thereby ruining the same.

.Vhile Ihave in the present instance shown and described one embodiment of my invention, it is of course to be understood that the device may be subjected to modifications and variations without departing from the spirit of the invention. For instance, instead of forming the frame with separate arms, as is shown in Fig. 2, it may be made integral or of any piece in the form of an elongated wire loop, as shown at J in Fig. 3, and any snit able material of a dark color may be employed as the covering for the frame.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination with a plate-ho1der slide, of a light-excluding attachment removably secured to said slide, said attachment comprising a loop-shaped frame and a coverin g of light-exclndin g material for said frame, substantially as set forth.

2. A device of the class described, comprising a wire frame formed with interlocking 

